class Sum { 
	    	int n;								       	        float f() { 
			      float sum=0;
			      for(int i=1;i<=n;i++)				 			                sum=sum+i;
			                return sum;  
	         }
}
class Average extends Sum {
	       int n;  									        float f() { 
		      float c;
       	            super.n=n;								          c=super.f();
		   return c/n;									    }
		   float g() {
			          float c;
	         		   c=super.f();
		       	          return c/2; 
		   }
}
public class Example5_7 {
	   public static void main(String args[]) {
		          Average aver=new Average();
			  aver.n=100;	       
			   float resultTwo=aver.g(); float resultOne=aver.f();
             		       System.out.println("resultOne="+resultOne);			         System.out.println("resultTwo="+resultTwo);
	   }
}
